Basic i18n support for labels; rename conf:loadVocabulary

* If vocabulary labels exist in multiple languages, the right one is now shown
* conf:loadVocabularyFromURL renamed to conf:loadVocabulary
* The title case algorithm for labels now splits CamelCase and better handles dashes
* dcterms:title and dcterms:description are recognized by default as label/commentProperty
Work-in-progress config for LOV
Loaf RDF, RDFS and OWL vocabularies
Fix listPropertyValues broken earlier
Autodiscover high-degree props; value pages w/o prefix decl

* High-degree properties are now automatically recognized
* Value pages now work for properties without declared namespace
Merge branch 'deploy-lov.okfn.org' of https://github.com/cygri/pubby into deploy-lov.okfn.org
Merge branch 'feature-browsable-ns' into deploy-lov.okfn.org
README points out that this branch is deployment-only